 During the next five years, Candela designed a number of residential buildings on the Upper West Side, primarily on West End Avenue and Riverside Drive.During this period, the West side was undergoing an intense transformation from an area of primarily single-family homes to one characterized by the apartment buildings.Candela's greatest work would occur during the latter half of the 1920s, when he designed numerous apartment buildings on the Upper East Side, primarily on Fifth Avenue and Park Avenue, as well as at Sutton Place and other locations.